They are investigated qualitative indices of a grain harvester New Holland CX8060 at sesame harvesting. The sesame genotype 4083 is used for experiments. It is developed at IRGR – Sadovo (Bulgaria) and has non dehiscent capsules at maturation. The tested harvester reaches seed’s purity of 84,4 % and loses up to 22%, two-thirds from which are due to the header. The high seed’s humidity of 14,4% has been the main reason for decreasing their germination capacity from 20 to 50 % by the harvester. Generally, the grain harvester does not met requirements at sesame harvesting at Bulgarian conditions, therefore is recommended developing a specialised unit for this agricultural operation.